The low-intensity heatwave is expected to peak today in two states before calming slightly, with temperatures set to skyrocket again on the weekend.

From Thursday onwards, meteorologists have forecast temperatures in some regions in the east to soar between four and 12 degrees above average.

The low-intensity heatwave is expected to peak today in two states before calming slightly, with temperatures set to skyrocket again on the weekend. (Getty)

Gusty conditions associated with a mix of troughs bringing warm air across the country will gradually start to heat up southern states such as Victoria and South Australia as well in the coming days.

The Bureau of Meteorology (BoM) has warned people at the NSW Southern and Central Ranges to brace for extreme fire danger, with a mix of hot, dry conditions and fresh westerly winds leading to serious risks.

In Sydney, some parts of the city’s west will reach almost 40 degrees today, while the metro will sizzle through temperatures around the 35 degree mark.

In Brisbane, it’ll be a steamy 34 degrees and sunny, at the Gold Coast it’ll be a similar 31 degrees, Canberrans will see a cloudy but humid day with temperatures expected to reach 29 degrees, it’ll be 28 and partly cloudy in Melbourne, 26 and fine in Adelaide and 26 degrees with a chance of showers in Perth.

Global annual sea surface temperature anomaly between 1900 and 2022. (NOAA/NCEI)

Meanwhile, fresh data has revealed global ocean temperatures have “rebounded” to record-challenging highs this week, as the planet brushes off the cool influence of La Niña.

“Earth’s ocean temperatures have been rising in recent decades due to the ongoing warming influence of climate change,” Weatherzone said.

Sea surface temperature anomalies in November 2021 (top) and October 2022 (bottom), showing distinct La Niña patterns with a large pool of abnormally cold water in the central and eastern tropical Pacific Ocean. These pools of cold water helped suppress global sea surface temperatures in 2021 and 2022 (NOAA)

“According to data from the US National Oceanic and Atmospheric Administration (NOAA), the global ocean temperature has increased by around 1 degree since 1900 and about 0.6 degrees since 1970.

“This background oceanic warming has been masked during the last two-to-three years by to the cooling influence of La Niña.

“However, La Niña is now over and our planet’s average ocean temperature has started to increase at an alarming rate.”

Record heat in NSW sparks bushfires

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